Curse on Hit
Supported Skills have a X% Chance to apply supported Curses on Hit
You cannot Cast Supported Curses
Curses cast via this trigger no longer possess their AoE effect, only affecting the enemy hit with the linked skill.
Linked curses roll their chance individually.
Traps and Totems supported by this gem will not apply any curses even though the tooltip says they can and curses linked to this gem are disabled from being cast directly. This is still true even when using a spell or attack linked to the Trap or Spell Totem/Ranged Attack Totem support gems.
To use this gem, it needs both a linked attack, and a linked curse. Otherwise it has no effect.
Gem level progression
This skill can be gained as a reward for finishing quest: